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14 Cards in this Set
- Front
- Back
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producers should select for those traits that have _______________
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economic value
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genotype+environment=
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phenotype
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for cattle, select for
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weaning weight and yearling weight
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for sheep, select for
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60, 90, 120 day weight
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for pigs, select for
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days it takes to get to 260 lbs
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progeny
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tells about the ability of the sire and dam from actual offspring. best when there are enough offspring
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expected progeny differences (EPD)
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use of estimate how future progeny of the subject animal will compare to progeny of other animals within the same breed
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EPDs are more accurate than anything else previously available because they account for (4)
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genetic value of sire the dam was bred to. environmental differences affecting contemporary groups. quality of other sires in contemporary group. genetic trend
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EPDs are reported in _______, _________, ________, _______, and _________. scrotal circumference is reported in ____________
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EPDs are reported in pounds for birth weight, weaning weight, yearling weight, maternal weaning weight, and maternal milk. SC is reported in centimeters
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for each EPD, an accuracy value ranges from ______
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0-1
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low accuracy value
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0-.50
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medium accuracy value
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.51-.75
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high accuracy value
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.76-.99
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positive accuracy values are _____ breed average. negative accuracy values are _____ breed average.
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+ above. - below.
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